keyval. Groups and levels are two kinds of keyboard mode;
in general, the level determines whether the top or bottom symbol
on a key is used, and the group determines whether the left or
right symbol is used. On US keyboards, the shift key changes the
keyboard level, and there are no groups. A group switch key might
convert a keyboard between Hebrew to English modes, for example.
GdkEventKey contains a group field that indicates the active
keyboard group. The level is computed from the modifier mask.gdkKeymapGetEntriesForKeyval(object, keyval)keyvalGDK_a, GDK_Up, GDK_Return, etc.TRUE if keys were found and returnedkeysGdkKeymapKey] return location for a list of GdkKeymapKeyn.keys